diff --git a/testing/web-platform/tests/css/css-transforms/parsing/scale-parsing-valid.html b/testing/web-platform/tests/css/css-transforms/parsing/scale-parsing-valid.html
index 9055e7dfd5f4..46bb91c8ba05 100644
--- a/testing/web-platform/tests/css/css-transforms/parsing/scale-parsing-valid.html
+++ b/testing/web-platform/tests/css/css-transforms/parsing/scale-parsing-valid.html
@@ -35,6 +35,7 @@ test_valid_value("scale", "100% 200%", "1 2");
 test_valid_value("scale", "100 200 1", "100 200");
 test_valid_value("scale", "100% 200% 1", "1 2");
 test_valid_value("scale", "100 200 300");
+test_valid_value("scale", "100 100 2", "100 100 2");
 
 </script>
 </body>